Which writer collaborated with Mark Twain on The Gilded Age?

Mark Twain collaborated with the writer Charles Dudley Warner on the 1873 novel The Gilded Age.123

The two authors, who were neighbors in the Nook Farm area of Hartford, Connecticut, wrote the book as a satire of the political and financial corruption prevalent in the United States at the time. The novel's title, which eventually became the name for the entire era, served as a provocation, suggesting that the period's outward appearance of success and wealth masked deep-seated corruption and societal fractures.13